1
066
B. Li et al. / Tetrahedron Letters 54 (2013) 1063–1066
Table 2
Recycling experiment of catalyst 1 and catalyst 2 for anisole brominationa
netic bar. The supported Au(III) catalyst shows high stability, and
allows to be used in four runs without apparent loss of activity.
It is hoped that this economical and recoverable immobilized
Au(III) catalyst might find applications in organic synthesis.
O
O
Cat.
+
NBS
Acknowledgments
DCE
Br
We acknowledge the Fundamental Research Funds for the Cen-
tral Universities (lzujbky-2010-32) and financial support from the
project supported by the National Science Foundation for Fostering
Talents in Basic Research of the National Natural Science Founda-
tion of China (J1103307).
Run
1
2
3
4
5
Catalyst 1 yieldb (%)
Catalyst 2 yieldb (%)
98
91
97
33
97
94
—
87
—
No reaction
a
Reaction condition: anisole (1.0 mmol), NBS (1.0 mmol), Catalyst (0.1 mol % Au
based on anisole), 2 mL. DCE, 25 °C, 3 h.
Supplementary data
b
Isolated yield.
Supplementary data (experimental details see Supplementary
References and notes
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1
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1
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